accessory after the fact accessory after the fact /əkˈsɛsəri ˈæftər ðə fækt/

noun

1. A person who gives assistance or comfort to someone known to be a felon or known to be sought in connection with the commission of a felony  ( accessory after the fact )
   a person who gives assistance or comfort to someone known to be a felon or known to be sought in connection with the commission of a felony